package com.atguigu.eduservice.service.impl;

import com.atguigu.eduservice.entity.EduCourse;
import com.atguigu.eduservice.entity.EduCourseDescription;
import com.atguigu.eduservice.entity.vo.CourseInfoVo;
import com.atguigu.eduservice.entity.vo.CoursePublishVo;
import com.atguigu.eduservice.entity.vo.CourseQueryVo;
import com.atguigu.eduservice.entity.vo.CourseWebVo;
import com.atguigu.eduservice.mapper.EduCourseMapper;
import com.atguigu.eduservice.service.EduChapterService;
import com.atguigu.eduservice.service.EduCourseDescriptionService;
import com.atguigu.eduservice.service.EduCourseService;
import com.atguigu.eduservice.service.EduVideoService;
import com.atguigu.commonutils.GuliException;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.util.StringUtils;

import java.util.HashMap;
import java.util.List;
import java.util.Map;

/**
 * <p>
 * 课程 服务实现类
 * </p>
 *
 * @author testjava
 * @since 2020-09-11
 */
@Service
public class EduCourseServiceImpl extends ServiceImpl<EduCourseMapper, EduCourse> implements EduCourseService {
    @Autowired
    private EduCourseDescriptionService eduCourseDescriptionService;
    @Autowired
    private EduVideoService eduVideoService;
    @Autowired
    private EduChapterService eduChapterService;

    @Override
    public String saveCourseInfo(CourseInfoVo courseInfoVo) {
        EduCourse eduCourse = new EduCourse();
        BeanUtils.copyProperties(courseInfoVo,eduCourse);
        int insert = baseMapper.insert(eduCourse);
        if(insert == 0){
            throw new GuliException(20001,"添加课程失败");
        }
        String cid = eduCourse.getId();
        EduCourseDescription eduCourseDescription = new EduCourseDescription();
        eduCourseDescription.setDescription(courseInfoVo.getDescription());
        eduCourseDescription.setId(cid);
        Boolean save = eduCourseDescriptionService.save(eduCourseDescription);
        if(save == false){
            throw new GuliException(20001,"添加课程简介失败");
        }
        return cid;
    }

    @Override
    public CourseInfoVo getCourseInfo(String courseId) {
        EduCourse eduCourse = baseMapper.selectById(courseId);
        CourseInfoVo courseInfoVo = new CourseInfoVo();
        BeanUtils.copyProperties(eduCourse,courseInfoVo);
        EduCourseDescription courseDescription = eduCourseDescriptionService.getById(courseId);
        courseInfoVo.setDescription(courseDescription.getDescription());

        return courseInfoVo;
    }

    @Override
    public void updateCourseInfo(CourseInfoVo courseInfoVo) {
        EduCourse eduCourse = new EduCourse();
        BeanUtils.copyProperties(courseInfoVo,eduCourse);
        int updateCourse = baseMapper.updateById(eduCourse);
        if(updateCourse == 0){
            throw new GuliException(20001,"修改课程失败");
        }
        EduCourseDescription eduCourseDescription = new EduCourseDescription();
        BeanUtils.copyProperties(courseInfoVo, eduCourseDescription);
        boolean upadteDes = eduCourseDescriptionService.updateById(eduCourseDescription);
        if(upadteDes == false){
            throw new GuliException(20001,"修改课程简介失败");
        }
    }

    @Override
    public CoursePublishVo publishCourseInfo(String courseId) {
        CoursePublishVo coursePublishVoById = baseMapper.getCoursePublishVoById(courseId);
        return coursePublishVoById;
    }
    //删除课程
    @Override
    public boolean removeCourse(String courseId) {
        eduVideoService.removeVideoByCourseId(courseId);
        eduChapterService.removeChapterByCourseId(courseId);
        eduCourseDescriptionService.removeById(courseId);
        EduCourse eduCourse = new EduCourse();
        eduCourse.setIsDeleted(1);
        eduCourse.setId(courseId);
        int count = baseMapper.updateById(eduCourse);

        return count > 0;
    }

    @Override
    public List<EduCourse> selectByTeacherId(String id) {
        QueryWrapper<EduCourse> queryWrapper = new QueryWrapper<EduCourse>();

        queryWrapper.eq("teacher_id", id);
        //按照最后更新时间倒序排列
        queryWrapper.orderByDesc("gmt_modified");

        List<EduCourse> courses = baseMapper.selectList(queryWrapper);
        return courses;
    }
    //分页查询课程列表
    @Override
    public Map<String, Object> pageListWeb(Page<EduCourse> pageParam, CourseQueryVo courseQuery) {
        QueryWrapper<EduCourse> queryWrapper = new QueryWrapper<>();
        if (!StringUtils.isEmpty(courseQuery.getSubjectParentId())) {
            queryWrapper.eq("subject_parent_id", courseQuery.getSubjectParentId());
        }

        if (!StringUtils.isEmpty(courseQuery.getSubjectId())) {
            queryWrapper.eq("subject_id", courseQuery.getSubjectId());
        }

        if (!StringUtils.isEmpty(courseQuery.getBuyCountSort())) {
            queryWrapper.orderByDesc("buy_count");
        }

        if (!StringUtils.isEmpty(courseQuery.getGmtCreateSort())) {
            queryWrapper.orderByDesc("gmt_create");
        }

        if (!StringUtils.isEmpty(courseQuery.getPriceSort())) {
            queryWrapper.orderByDesc("price");
        }

        baseMapper.selectPage(pageParam, queryWrapper);

        List<EduCourse> records = pageParam.getRecords();
        long current = pageParam.getCurrent();
        long pages = pageParam.getPages();
        long size = pageParam.getSize();
        long total = pageParam.getTotal();
        boolean hasNext = pageParam.hasNext();
        boolean hasPrevious = pageParam.hasPrevious();

        Map<String, Object> map = new HashMap<String, Object>();
        map.put("items", records);
        map.put("current", current);
        map.put("pages", pages);
        map.put("size", size);
        map.put("total", total);
        map.put("hasNext", hasNext);
        map.put("hasPrevious", hasPrevious);

        return map;
    }
    @Override
    public CourseWebVo selectInfoWebById(String id) {
        this.updatePageViewCount(id);
        return baseMapper.selectInfoWebById(id);
    }

    @Override
    public void updatePageViewCount(String id) {
        EduCourse course = baseMapper.selectById(id);
        course.setViewCount(course.getViewCount() + 1);
        baseMapper.updateById(course);
    }

}
